Association of socioeconomic stratification with plasmatic markers of lipoperoxidation and antioxidants in Venezuelan school-age children.

Objetive: To establish association between socioeconomic status and plasmatic markers of lipoperoxidation and antioxidants in Venezuelan school-age children from the middle-class and in critical poverty.

Methods: Cross-sectional study with a sample of 114 school-age children (aged 7-9). The socioeconomic status, dietary intake of macro and micro-nutrients, weight, height, lipid profile, indicators of lipid peroxidation and enzymatic and non-enzymatic antioxidants were determined.

Relationship between antioxidant in- take, nutritional factors and biochemical indicators in healthy volunteers.

Oxidative stress is an important risk factor for the development of cardiovascular ciseases (CVD) due to the serious damage caused by reactive oxygen species to biomolecules, thus, adequate intake of vitamins with antioxidant properties could prevent or delay the onset of these diseases. The aim of this study was to determine the relationship between antioxidant intake, nutritional factors and biochemical markers in a group of healthy individuals in Caracas, Venezuela. The study included 29 participants between 18-40 years of age who underwent three 24-hour dietary recalls, anthropometric measurements [weight, height, waist circumference (WC), waist-hip ratio (WHR) and % body fat (% BF)] according to the International Biology Program (IBP) methodology.

Normalization of load and clearance effects in ball-in-socket-like replacements.

A normalizing loading parameter useful in summarising the mechanical response of plane pin-in-plate-like contacts is extended to axisymmetric ball-in-socket-like contacts. An example addressing a compliant layered artificial hip joint is presented, and the usefulness of the normalizing loading parameter is evidenced.